This specially formulated non-metallic material is the result of years of research and development, resulting in a virtually artefact-free opaque marker that is perfect for nearly all CT marking applications.
Different references available:
CT-W10 : 1.0mm CT wire on diamond label
CT-CR3: 1.2cm (0.5 inch) CT Cross on Round Label
CT-W20: 2.0mm CT Wire on diamond label
CT-23: 2.3mm CT ball on label
CT-40: 4.0mm CT Ball on label
CT-O: CT Circle on label